# I am confused on how to think about potential energy stored in capacitors [duplicate]

Energy stored in capacitors is represented by $$U = \frac{1}{2} QV$$

Now I have heard 2 reasons why there’s a half factor, unlike the general potential energy equation, which is $$U = QV$$.

1. Capacitors should’ve stored $$QV$$ amounts of energy. But, because electrons are being pushed to a negative plate, and electrons are being pulled off from an increasing positive plate, work is being done and half of $$QV$$ is needed to do work. The remaining half is the energy stored in capacitors.
2. When you are discharging a capacitor, voltage keeps on decreasing as charge keeps on decreasing. As a result, energy keeps on decreasing and the sum of the energy transferred happens to be half of $$QV$$.

I don’t really know what’s the correct way to approach this. Both sound equally valid to me.